I've been through 4 Xboxes. It wasn't the wires.
One I even went through the trouble of trying the X-Clamp fix. It was pointless. I've gone through a PS3 also, so I can't really vouch for either. At this point I feel like it's just a fact of life that if you want to play video games, you're going to have to buy 500 consoles. The new systems have so much bullshit in them that can go wrong, and they do.
I bet I could buy a crusty NES off of Ebay, drop it in a few puddles and as long as i blew into the cartridge, it would still turn on.